Church of the Nativity of the Virgin Mary, Medieval church in Klatovy I, Czech Republic.

The Church of the Nativity of the Virgin Mary is a medieval structure with multiple bells in its tower, two of which date from 1876 and feature historical inscriptions. The building displays architectural elements from the Romanesque and Gothic periods that evolved over centuries.

Begun probably shortly after Klatovy's founding in the late 13th century, the church was rebuilt around 1400 with a transept, presbytery and two sacristies, funded partly by indulgences granted by Pope Boniface IX in letters of 1399 and April 1400. After a storm brought down the roof and vaulting, master Antonín rebuilt the western part of the nave in 1551–1558. Architect Josef Fanta led the 1898–1919 restoration, which removed Baroque alterations and added Neo-Gothic elements; the church was then raised to archdeaconry status.

The church is the parish church of Klatovy and was raised to archdeaconry status after its 1898–1919 renovation, a distinction Bishop Šimon Bárta justified by the emphasis on Marian devotion. The parish chronicle records that in the pre-Hussite period the church was so full that worshippers stood up to the altar.

The church is oriented to the east, with the main portal in the western facade; side entrances in the north and south facades are now locked. The nave is flanked by seven tall three-part windows on each side, and the choir loft occupies the first western bay of the three-aisled interior.

The church's present form comes from a 1898–1919 reconstruction led by architect Josef Fanta, paid for partly by a lottery with 6,000 tickets. Fanta removed earlier Baroque alterations and added Neo-Gothic elements inspired by Jan Willenberg's 1602 engraving.